Sight-feed oiler for automobiles.



J. ECKHARD.

SIGHT FEED OILER FOR AUTOMOBILES.

APPLIOATION IILED NOV. 29, 1909.

974,249, Patented Nov. 1, 1910.

3 SHBET8-8HEBT 1.

L6 4 p L m 4;, I 6 JJJL'TUZE'CJQMTEA MW ww mg J. EGKHARD.

Patented Nov. 1,1910.

3 SHEETS-SHEET 3.

J. ECKHARD. SIGHT FEED OILER FOR AUTOMOBILES.

APPLICATION FILED NOV. 29, 1909.

Patented Nov. 1, 1910.

3 SHEETS-SHEET 2.

CC ws'ea WM Mg JOHN ECKHABD, OF BOSTON, MASSACHUSETTS.

SIGHT-FEED OILER FOR AUTOMOBILES.

Specification of Letters latent;

Patented Novrl, 1910.

Application filed November 29, 1909. Serial No. 530,350.

To all whom it may concern:

Be it known that I, J'OHN EGKHARD, a citizen of the United States,residing at Boston, county of Sufiolk, State of Massachusetts, and whosepost-ofiice address is No. 504 East Fourth street, South Boston,Massachusetts, have invented an Improvement in Sight-Feed Oilers forAutomobiles, of which the following description, inv connection with theaccompanying drawing, is a specification, like characters on the drawingrepresenting like parts.

This invention relates to sight feed oilers for automobiles and has forits Principal object to provide a novel device 0 this character by meansof which the oil will be delivered to the bearings in uniform quantitiesregardless of the speed of the engine.

I will first describe one embodiment of my invention and then point outthe novel features thereof in the appended claims.

Figure 1 is a side view of the front part of an automobile truck towhich my invention is applied; Fig. 2 is an enlarged sectienal viewthrough a portion of the cylin der and crank case; Fig. 3 is a frontviewof the en inc and crank case showing the sys tem of piping; Fig. 4'is a detail of the relief valve hereinafter described; Fig. 5 is asection on the line a:-m, Fig. 2. Fig. 6 is a vertical section throughthe cylinders an crank case of the englne. v

My improved .oilin system may be applied to any automobi e and for thepurpose of illustrating it I have shown it herein as ap lied to anautomobile truck.

11 the drawings 3 designates generallythe truck havin Y the seat 4, thesteering wheel .5

and the das -board 6. The engine which drives the truck is showngenerally at 7 and it has associated therewith the closed crank case 8.The crank shaft is, shown at 9 and the cam shaft which operates thevalves of the engine. is shown at 10.

I have not attempted to show herein the details of the engine as itforms no part of the present invention, and my improved oiling systemmight be used with any en- The oilin stem herein shown is adapted to oilbot t e bearings of the crank shaft and the istons of the engine and itis similar to ot er oiling s stems in that it is so arranged hat the 0'which accumulates in the bottom of the crank case is pumped through thesystem and is delivered to the bear ngs to be lubricated.

The ump is shown at 11 and it may be of any suitable type but willreferably be a gear pump which is operate by a shaft12 that is drivenfrom the cam shaft 10 by,

means of the bevel. gears 13. A pipe 14 connects the pump with the.bottom of the crank casing and another i e 15 leads from the pump up toa slght o1 eed 16 which is located where it ca be readily seen by thedriver of the autorl'iobile and ma conveniently be secured to thedashboa'r 6. This si ht oil feed com rises a glass casing into w 'ichthe pi e 15 eads and the end of said pipe is provi ed with a goose-neck17 so that the oil which is delivered from the pipe can be seen. Theglass casing 16 has connected thereto another pipe 18 through which theoil is delivered to the bearings. This pipe 18 leads into a channel 19formed in the wall ofthe crank casing and the channel has extendingtherefrom delivery pipes 20 that lead to the bearings that are to belubricated. This channel 19, which extends the length of the crank case,has other channels 21 communicating therewith which extend upwardlythrough the walls of the cylinders o the engine 7 and each channel orduct 21 terminates in the discharge port 22 throu h which oil isdelivered to the interior of t e cylinder for lubricating the piston.

It will be evident that since the pump is operated by the engine, thepumping action will be faster or slower depending on. the s eed of theengine. It is, however, desira le that the amount of oil delivered tothe bearing shall be substantially uniform regardless of the speed ofthe engine, for if the oil is delivered to the bearings too rapidly, theengine will smoke, while if not delivered rapidly enough the bearingsare not sufiiciently lubricated. In'order to rovide for a uniformdelivery of oil regar less of the speed of the engine, I have provided abypass arrangement adapted to receive thesuxgflus oil and return it tothe crank casing, an I have arranged this by-pass so that it isbroughtinto play only when oil is bein delivered from the ump fasterthan it is needed for lubricating purposes. This bypass is shown at 23and one end connects to the pi e 15 on the delivery side of the pump anthe other end connects to the crank case chamber. The pipe 15 hastherein a mined amount, the valve will open and admit thesurplus oil tothe by-pass. While this relief valve may have any suitable constructionI have herein shown it at 25 as controlling a port 26 leading into thepipe 15 and-as controlled by a spring 27 which tends to-kee'p it seated;The valve is pro- 1 vided with a stem 28, the end of which plays in arecess formed in a plug spring 27 is confined between the plug and thevalve and tends to keep the valve seated. It will be noticed-cthat thevalve opens outwardly and the spring 27 will be so adjusted by means ofthe plug 29 that the pressure required to'open the valve will besomewhat more than that produced by the column of oil from the pump tothe sight feed 16. .The valve 24 will be set so that when the engine isworked normally sufiicient oil will be pum ed into the casing 16 to proerl oil the earings. Whenever the s o the engine increases, the pump wiobviously operate. faster and as only a certain predetermined amount ofoil can pass the valve 24 the pressure created in the ipe 15 below thevalve 24 will openthe 'rdlief valve 25- and permit the surplus oil intothe bypass 23. 4

My. invention also comprehends a con-' struct-ion by which the oil willbe-su plied evenly to all of the bearings regardlless of their position;It will be seen that the ort 22 in the cylinder is situated above thenet 19 from which the pipes 20 are fed, and as a result when the pipe 18is full of oil there will be a greater pressure in the duct 19 than atthe port 22 so that if the port '22 should become" clog ed slightly theoil might not be delivere therefrom but would be delivered in too greatquantities through the pi e 20. In order to provide for an evendihtribution-of the oil, I provide each of the ports leading from the'oilduct with spring-preswd valves which normally close the ports, butwhich will open only under a predetermined ressure. For instance,'theport 22 is closed y a valve 30 which is held to its seat 31 by a spring32. This valvehas a stem 33 which extends throu h a sleeve 34 that isscrew threaded into a ushin 35 that in turn is sup orted in the side 0the cylinder 7. The s eeve 34 has the spider 36 through which the stem'33 passes and against which one end of the spring 32 rests,

the other end of the sprin bearing against a pin or collar 37 0&1118d. ythe valve stem. A cap 38 screws over the bushing 35 and closes the endthereof. The. valve seat 31 is located between the end of the duct 21.

29, that is screw-threaded into the cap 300 and the to pass aroundadjusting Y the oi sight feed, a pump operated by the engine,

and the port 22 and said sleeve is provided with ports39 that afiordcommunication between the port 22 and the duct 21. The purpose of thescrew-threaded sleeve 34 is to permit of adjusting the tension of theber has therein a screw-threaded bushing 41 7 formed at its inner endwith a valve seat'42 against which a valve 43 seats, said valve having astem 44'that extends through the sleeve 45 that is screw-threaded intothe bushing. A spring similar to sprin 32 serves to hold the valve toits seat and the tension of the spring may be adjusted by the sleeve 45;A cap 47 closesthe' outer en of the bushing 41, and said bushing islprovided with ports 48 through which is delivered from the duct 19.Each of the oil delivery ports will preferably be.

provided with, a similar spring-pressed of the various valves valve andthe ring:

t at they will open only will be ad'uste so under pre eterminedpressure; In this way the valves may be so adjusted that all of thevalves will open simultaneously and there will, therefore, be no dangerthatthe oil will flow too rapidly through any port. By re- I movingeither the ca 38 or the cap 47 the valve is made. accessi e either forthe-purpose of adjusting the s ringycleaning, repairing, or even to seei itis working. 7

Havin' fully described my invention, what I aim as new and desire tosecure by Letters Patent is p i 1. In asight-feed oiling system,"'thecombination with an engine having hearings to be oiled and an inclosedcrank case, ,of a

a pipe connecting the inlet of the pump to the crank case, another pipeconnecting, the outlet of the pump to the sight feed, a valve in saidlatter pipe to control the ainountof oil delivered to the sight feed, aby-pass pipe connecting said latter pipe with the crank case andprovided with a-spring-congftrolled valve. and a pipe to deliver oilfrom "the sight feed to the bearings.

2. In a device of the'class described, the combination with an enginehavin a closed crank case and hearings to be oile and also having achannel formed in the wall of the crank case and other channelscommunicating therewith and formed in the walls of the cylinder, saidlatter channels terminating in ports for delivering oil to the cylinder,of means to deliver oil'to said channels, and. an automatic valvecontrolling the supply of oil from the channel to each ort. -v

3. In a device of the class described, the

combination with an engine having a closed crank case and hearings to heoiled and also having a channel formed in the wall of the crank case andother chanels communicating therewith and formed in the walls of thecylinder, said latter channels terminating in ports for delivering oilto the cylinder, of means to deliver oil to said channels, and aspringrpressed 'valve controlling'the supply of oil from the channel toeach port and opening in the direction of the flow of the oil.

4. In a device of the class described, the combination with an enginehaving cylinders and a closed crank case and also having hearings to heoil'ed, said crank case having a channel formed in the walls thereofwhich runs longitudinally, and each cylinder haviug' a channel formed inthe wall thereof, which channel extends longitudinall y of the cylinderand communicates with the first-named channel and also communicates withthe interior of the cylinder, of lneans to deliver oil fromthefirst-named channel to the bearings to be oiled, a sight;

crank case but connected thereto, a pipe collecting the outlet of thepump to the sight feed, a valve in said pipe to control the amount ofoil delivered to the sight feed, a pipe to deliver oil from the sightfeed to the bearings, and a by-pass provided with a spring-controlledvalve to return surplus oil from the pump to the crank case.

, In testimony whereof, I have signed my name to this specification, inthe presence of two subscribing witnesses.

JOHN ECKHARD. \Vitnesses:

LOUIS G. SMI'BH, THOMAS J. DEUMMOND.

